Del Rey Books is a branch of Ballantine Books, which is owned by Random House and, in turn, by Penguin Random House. It is a separate imprint established in 1977 under the editorship of author Lester del Rey and his wife Judy-Lynn del Rey. It specializes in science fiction and fantasy books, and formerly manga under its Del Rey Manga imprint. It publishes the Star Wars novels under the LucasBooks imprint.